|DVD drives don't require you connect an audio cable to them in order for you to hear sound. Recent ones may not even have the capabilty of connecting an audio connection to them. The sound is sent via the data cable from the drive to the computer. |
The same applies to any optical drive made since the late 90's, if not earlier.
It's possible that if there's a problem with the data cable connection, you may get no sound.
It is common to un-intentionally damage IDE data cables, especially while removing them - the 80 wire ones are more likely to be damaged. What usually happens is the cable is ripped at either edge and the wires there are either damaged or severed, often right at a connector or under it's cable clamp there, where it's hard to see - if a wire is severed but it's ends are touching, the connection is intermittant, rather than being reliable.
Another common thing is for the data cable to be separated from the connector contacts a bit after you have removed a cable - there should be no gap between the data cable and the connector - if there is press the cable against the connector to eliminate the gap.
80 wire data cables are also easily damaged at either edge if the cable is sharply creased at a fold in the cable.
Try another data cable if in doubt.
E.g. there were two guys who posted here not long ago that had IDE hard drives and the hd activity led wasn't working for one drive. When they replaced the IDE data cable, the hd activity led worked fine for all the IDE hard drives.
Check your SATA data cables. The connector on each end should "latch" into the socket on the drive and on the mboard, or on the drive controller card - it should not move when you merely brush your hand against it near the socket - if it does, mere vibration can cause a poor connection of it - use another SATA data cable that does "latch", or tape the connector in place.
(There is a slight projection or bump on one side of the outside of the connector that "latches" it into the socket - it's easily broken off or damaged)
The same thing applies for the SATA power connection.